用python寫一個指令碼，讀取srt檔案中的內容，並列印出重複的內容，且將不重複的內容儲存到新檔案中

程式碼：

# 定義一個函式來處理檔案
def process_file(src_filename, unique_filename):
    seen = set()
    duplicates = set()
    with open(src_filename, 'r', encoding='utf-8') as file:
        for line in file:
            # 將讀取的行轉換為小寫，以避免大小寫差異導致的重複
            normalized_line = line.strip().lower()
            if normalized_line in seen:
                duplicates.add(normalized_line)
            else:
                seen.add(normalized_line)

    # 列印重複的行
    for dup in duplicates:
        print(f"Duplicate: {dup}")

    # 將不重複的行寫入新檔案
    with open(unique_filename, 'w', encoding='utf-8') as file:
        for line in seen:
            file.write(line + '\n')


# 呼叫函式，指定原始檔和新檔案的名稱
process_file('zhong.srt', 'unique.srt')